Teaching protractor



FIG. 1 is a top plan view of a teaching protractor showing my new design;

FIG. 2 is a typical side elevational view thereof;

FIG. 3 is a sectional view as taken from line 3--3 of FIG. 1;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is an enlarged sectional view as taken from line 5--5 of FIG. 4;

FIG. 6 is an enlarged sectional view as taken from line 6--6 of FIG. 4. 

The ornamental design for a teaching protractor, as substantially shown. 